Name: Guobaorou (Crisp Sweet-and-Sour Pork Slices)
Prep time: 50 min
Cook time: 15 min
Total time: 1 h 5 min
Yield: 3 servings
Cuisine: Chinese
Ingredients: 400 g pork loin; 0.5 tsp salt; 0.25 tsp white pepper; 1 tbsp Shaoxing wine; 1 tsp ginger juice; 150 g potato starch; 150 ml water; 1 tbsp neutral oil; 1 L frying oil; 4 tbsp sugar; 4 tbsp vinegar; 3 tbsp water; 1 tsp soy sauce; 0.25 tsp salt; 1 tbsp ketchup; 20 g ginger; 40 g carrot; 2 stalks spring onions; 2 tbsp coriander

Ingredients

3servings

Pork and marinade
pork loin · or tenderloin; cut into wide 3mm slices400 g
salt0.5 tsp
white pepper0.25 tsp
Shaoxing wine · or dry sake1 tbsp
ginger juice · grate ginger and use the juice1 tsp
Batter
potato starch · cornflour changes the texture150 g
water · to hydrate the starch; pour the clear water off the top150 ml
neutral oil · into the batter — it makes the crust split and puff1 tbsp
frying oil · at least 5cm deep1 L
Sauce (no starch slurry)
sugar4 tbsp
vinegar · rice or plain white4 tbsp
water3 tbsp
soy sauce · for colour and depth only; more makes it muddy1 tsp
salt0.25 tsp
ketchup · optional; where the modern Harbin red comes from1 tbsp
Garnish
ginger · in very fine julienne — this is the dish's aroma20 g
carrot · julienned40 g
spring onions · white parts, julienned2 stalks
coriander · optional2 tbsp

Steps

Stir the water into the potato starch and leave it at least 30 minutes. The starch settles and clear water rises; pour that off and use only the thick paste underneath. This is where the glassy, cracking crust starts.
⏲ 30 min
Cut the pork into wide slices about 3mm thick. Thinner and you are eating batter; thicker and the crust burns before the middle cooks.
⏲ 10 min
Marinate the pork 10 minutes with salt, pepper, Shaoxing wine and ginger juice. The juice is there to handle any porkiness; the aroma comes later from the julienned ginger.
⏲ 10 min
Julienne the ginger, carrot and spring onion very fine and set them within reach — they go in during a ten-second window at the end.
⏲ 5 min
Stir the tablespoon of oil into the settled starch paste. Thick yoghurt is the right consistency; loosen it with a very little water if it is stiffer than that.
⏲ 2 min
Coat the slices one at a time, laying them out separately so they do not stick together.
⏲ 5 min
Heat the oil to 150°C and fry the slices, one at a time as you lower them in, for 2 minutes. They will barely colour — this pass is only about cooking them through.
⏲ 2 min
Lift them out and rest 5 minutes. Steam escapes from inside, and without that pause the second fry cannot dry the crust.
⏲ 5 min
Raise the oil to 190°C and fry again for 60-90 seconds, until the crust cracks and turns deep gold. Drain on a rack.
⏲ 2 min
In a pan, reduce the sugar, vinegar, water, soy and salt (plus ketchup) over medium heat for 2-3 minutes — done when it bubbles in large bubbles and a spatula leaves a trail that holds for a moment. No starch slurry goes in.
⏲ 3 min
Turn the heat high, add the pork and the julienned ginger, carrot and onion, and toss for no more than ten seconds before plating. Left in the pan, the crust drinks the sauce.
⏲ 1 min
Scatter coriander and serve immediately. This dish is at its best one minute old; at five it has become something else.
⏲ 1 min

Tips & Variations

Variations

Harbin vs Liaoning. The recipe above is the red, sweet-sour Harbin

(Heilongjiang) version. The Liaoning (Shenyang) one skips the ketchup, reduces the sugar further into an amber syrup, and often uses only spring onion instead of carrot and ginger. Same name, different colour from the start.

Chicken breast or white fish work with the same method; cut the second fry to

about 40 seconds for fish.

Make the sauce in advance and reheat it to syrup consistency — it takes a lot

of pressure off the final minute.

The difference from tangsuyuk is what defines this dish.

Tangsuyuk's sauce is thickened with a starch slurry; this one is sugar reduced to a syrup. So tangsuyuk's sauce soaks into the coating while guobaorou's stays as a thin glaze on the surface.

Orange chicken belongs to the same syrup-sauce family.

Tips

It has to be potato starch. Cornflour gives a denser, more shattery crust that

goes soggy much faster once sauced. Hydrating and settling the starch is part of the same logic — the granules need enough water to swell and split in the oil.